Science

It can produce static electricity when negatively charged by applying friction. Because of that, ancient Greeks named amber “elektron,” which became the basis for the word electricity.

Compounds of other heavy metals, such as copper, lead, or mercury, also have such properties, but si ...

Oily layer–smoothens the tear’s surface and prevents evaporation of other layers Mucous layer–allow ...

Purity levels above 99.999 percent can also be found.

It is not dipolar, so it is assumed that its source is not the nucleus but the crust.

Aa is basaltic lava and is characterized by a rough, jagged surface. It forms rare but large gas bub ...

Many species for their lives require a small amount of them. They can be saprophytes feeding on dead organic matter, or parasites developing at the expense of other, living organisms.

This is a major obstacle to graphene finding mass application in many fields. For now, only small amounts are produced.